What Are Core Web Vitals

In the dynamic landscape of online success, the impact of slow-loading websites cannot be overstated. As we navigate the digital era where user satisfaction is paramount, understanding and optimising for Core Web Vitals is not merely a choice but an absolute necessity.

Let’s delve into the intricate details of these vital signs and unravel their profound impact on your website’s performance, user engagement, and, most significantly, its position in the fiercely competitive realm of search engine rankings. Join us on this journey as we dissect the nuances of Core Web Vitals and guide you through the steps to elevate your website’s standing.

What Are Core Web Vitals?

In the fast-paced world of the internet, understanding the concept of Core Web Vitals is like holding the key to unlocking a website’s true potential. These vital signs are a set of performance metrics crucial for gauging user experience, and they include three main components: Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS).

Understanding these Core Web Vitals is like learning the language of website health. Just as vital signs help assess a person’s well-being, these metrics gauge a website’s overall performance and user-friendliness. 

In the next section of this blog, let’s understand these three main components of web core vitals on a deeper level. 

4 Coral Web Vitals:

1. Improve Interaction to Next Paint (INP):

    • INP takes center stage as a Core Web Vital, aiming to redefine the user experience by focusing on the interaction improvements leading up to the next paint on a webpage. This metric marks a paradigm shift from First Input Delay (FID) and accentuates the seamless transition from user interaction to the subsequent visual response.
    • INP is instrumental in quantifying the efficiency with which a webpage responds to user interactions. It measures the time it takes for a page to become fully interactive after a user input, ensuring a responsive and engaging user experience. Google acknowledges INP as a pivotal metric for evaluating the dynamic responsiveness of a webpage, underscoring its significance in enhancing user satisfaction.
    • In essence, a low INP signifies a more responsive and interactive website, contributing to an overall positive user experience. As user engagement becomes increasingly intertwined with website responsiveness, INP emerges as a critical factor in optimizing web performance and fostering user satisfaction.
    • Achieving an INP below 100 milliseconds is considered good, aiming for an ideal benchmark under 50 milliseconds, while an INP surpassing 300 milliseconds is deemed unfavorable.

2. Largest Contentful Paint (LCP):

    • LCP acts as the pulse of a webpage’s loading speed, measuring the loading time of the largest content element on a web page, typically an image or a block-level element.
    • LCP is crucial for assessing the perceived loading speed of a page. A fast LCP ensures that users quickly see meaningful content, enhancing the overall user experience. Google considers LCP as a key metric for evaluating page performance and user satisfaction.
    • A desirable LCP falls below 2.5 seconds, with an ideal goal set under 1.5 seconds, while an LCP exceeding 4 seconds represents a suboptimal user experience.

Also Read – Top 10 Google Algorithms You Should Know Before You Start Doing SEO

3. First Input Delay (FID):

    • Ever clicked a button on a website only to be met with a frustrating delay in responsiveness? That’s where FID comes into play. It measures the time delay between a user’s first interaction (such as clicking a button or a link) and the browser’s response to that interaction.
    • FID is essential for evaluating the responsiveness of a website. A low FID ensures that users can interact with the page without delays, contributing to a positive user experience. FID is especially critical for pages with dynamic content and interactive elements.
    • A favorable FID is under 100 milliseconds, striving for an ideal duration below 50 milliseconds, and an FID surpassing 300 milliseconds is indicative of a less responsive user interaction.

4. Cumulative Layout Shift (CLS):

    • CLS quantifies the unexpected layout shifts that occur during the loading of a web page, affecting the stability of elements.
    • CLS is crucial for visual stability and user experience. A low CLS score indicates that page elements are not shifting unexpectedly, preventing frustrating experiences for users. It ensures that users can confidently interact with the content without mistakenly clicking on unintended elements due to sudden layout changes.
    • Attaining a good CLS below 0.1 is recommended, targeting an ideal metric below 0.05, while a CLS exceeding 0.25 signifies a subpar visual stability and layout consistency on the webpage.

These three key metrics focus on different aspects of web page performance and collectively contribute to a positive user experience by ensuring fast loading times, responsive interactions, and visual stability on websites. Optimizing for these Core Web Vitals is essential for improving overall website performance and meeting the expectations of modern online users.

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The Importance of Core Web Vitals for SEO

1. Impact on Search Engine Rankings:

Ever wondered why some websites effortlessly snag the top spots on Google while others linger in the shadows? Let’s lift the curtain and peek behind the scenes.

When you search for something on Google, you probably click on the results that load quickly and smoothly. Here Core Web Vitals, like Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS), play a critical role. It acts like a digital scorecard determining your website’s SEO success. Websites that score well on these metrics tend to rank higher because they offer a better user experience.

Why it Matters: 

Think of it as Google’s way of saying, “Hey, let’s make sure people find what they’re looking for and have a great time doing it.” So, if your website provides a seamless experience, Google is more likely to showcase it to users.

2. Google’s Emphasis on User Experience as a Ranking Factor:

Google wants its users to have a positive experience online. It’s not just about finding the right information but it’s about enjoying the process. Positive experiences mean people stay on a website longer, explore more pages, and leave satisfied.

Core Web Vitals are like a quality check for websites. They focus on how fast a page loads, how quickly it responds to your clicks, and whether things jump around unexpectedly. Google believes websites that ace these tests offer a better experience, and they deserve a higher spot in search results.

3. Relation Between Core Web Vitals and Mobile-First Indexing:

With so many of us using phones to browse, Google has made mobile versions a priority. They want websites to be just as awesome on phones as they are on bigger screens.

Core Web Vitals aren’t just for show; they’re crucial for websites in the mobile-first era. If your site is mobile-friendly and passes the Core Web Vitals test, Google is more likely to recommend it when people are searching on their phones.

Do you know? According to Google, 70% of mobile pages take longer than 5 seconds to display visual content. It’s a massive turn-off for users navigating the digital landscape. 

Core Web Vitals become the choreographers in this scenario, ensuring a well-organised and visually stable mobile store goes a long way in the market. 

And If you truly want people to stay on your website and buy from it, check out the digital marketing course IMS Proschool offers. They have experts from MICA, IITs, and IIMs who share their knowledge on digital marketing topics. Check it out to boost your website sales.

In a nutshell, Core Web Vitals are like the good manners of the internet world. They not only help your website get noticed but also ensure that visitors have a smooth and enjoyable experience, whether they’re on a computer or a smartphone.

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How to Measure and Improve Your Core Web Vitals

Now that you know about the Core Web Vitals, let’s understand some tools that help to measure these metrics:

Tools and Methods for Assessment: Unveiling the Metrics

  1. Google PageSpeed Insights: Your Digital Speedometer
    • Gauges the health of your website’s performance.
    • Pinpoints areas for enhancement, similar to a car tune-up.
    • Aiming for a score of 90 or above ensures smooth cruising in the digital landscape.
  1. Lighthouse: Illuminating Optimization Opportunities
    • Acts as a spotlight, revealing areas for improvement.
    • Evaluates performance, accessibility, and SEO.
    • Offers a tailored workout plan for your website’s enhancement.
  1. Web Vitals Chrome Extension: Real-Time Insights for Immediate Action
    • Provides real-time insights as you navigate your website.
    • Instant feedback on key metrics like Largest Contentful Paint (LCP) and Cumulative Layout Shift (CLS).
  1. GTmetrix: Comprehensive Performance Analysis
    • Offers a detailed analysis of page speed and structure.
    • Provides actionable insights for performance improvement.
    • Streamline your website’s performance to meet Core Web Vitals criteria.
  1. Web.dev: Google’s All-Inclusive Guidance
    • Google’s hub for comprehensive web development guidance.
    • Utilises tools like Lighthouse for insights into performance and SEO.
    • Offers in-depth guidance and optimization tips for your website.

Whether you’re focusing on speed, layout stability, or overall user experience, each tool plays a unique role in ensuring your website meets the standards set by Google for optimal performance.

Also Read – 10 Free & Paid SEO Tools You Should Use To Rank #1 In 2024

Practical Tips for Improvement: Fine-Tuning Your Website

  1. If using a CMS like WordPress – use a fast theme such as Avada, Astra, Divi etc. 
  2. Defer all non-essential Javascripts such as third-party scripts. 
  3. Optimize the number of requests sent to the server. More the number of requests, slower the website. 
  4. For WordPress readers, use the functionality of creating Critical CSS – Only the CSS essential for the 1st fold of the website is loaded. All other CSS is deferred. 
  5. Preload all large images. There are plugins and scripts to help you do so. 
  6. In WordPress, turn off all unused elements. 
  7. Use Webp format for images & SVG format for vectors instead of JPG & PNG respectively.

Core Web Vitals and the Future of SEO

  • User Experience Takes Center Stage:
      • SEO is increasingly tied to user experience, with search engines favoring websites that provide seamless, enjoyable interactions.
  • Site Performance as a Crucial Factor:
      • Core Web Vitals, assessing loading speed, interactivity, and visual stability, will become pivotal in determining search rankings.
  • Continuous Evolution of Metrics:
      • INP replaces FID as a Core Web Vital, pivoting from measuring post-input delays to evaluating interaction efficiency leading to the next visual update. This shift reflects a more holistic approach, emphasizing seamless transitions in user experience for enhanced web performance.
  • Holistic SEO Approach Beyond Keywords:
      • The future of SEO requires a broader perspective, emphasizing user experience alongside traditional factors like keywords.
  • User-Centric Strategies and Inclusivity:
    • SEO strategies will shift towards user-centric practices, prioritizing high-quality, accessible content and mobile responsiveness. Websites catering to diverse audiences may gain a competitive advantage.

And if you truly want to make the most of it, learn from the experts from MICA, IITs, and IIMs who share their knowledge on these topics. You can check this out in the digital marketing course at IMS Proschool. Check it out to grow your website and boost your traffic. 

Also Read – Top 15 SEO Skills That Can Make You a Search Engine Wizard


Congratulations on completing this journey into the heart of Core Web Vitals and their pivotal role in SEO. Armed with insights into the Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and First Input Delay (FID), you now hold the keys to improving the end-user experience and search engine rankings. As you reflect on the importance of fast-loading pages and seamless interactions, your next steps involve implementing practical tips and tools like Google PageSpeed Insights and Lighthouse for ongoing assessment. Stay attuned to the evolving landscape of Core Web Vitals, prioritise user experience, and watch your website rise in the digital arena.


What is a good core web vital score?

A robust Core Web Vitals score, following Google’s user-friendly benchmarks, entails achieving an LCP (Largest Contentful Paint) within the speedy 2.5 seconds, an FID (First Input Delay) responding in less than 100 milliseconds, and a CLS (Cumulative Layout Shift) maintaining stability under 0.1. Hitting these targets on desktop and mobile both ensures your web pages load swiftly and respond promptly to user interactions, creating a visually stable and pleasant experience. 

How does SEO increase visibility? 

SEO boosts visibility by optimising a website’s content, structure, and performance to align with search engine algorithms. This involves strategic keyword placement to identify authoritative websites with valuable content, securing higher rankings on SERPs. This increased visibility attracts users seeking related information, products, or services, leading to a boost in organic traffic.

Where are core web vitals measured?

Core Web Vitals are measured in browsers as users interact with a website. Google’s tools like PageSpeed Insights and Lighthouse are commonly used to measure and analyse these Vitals. They go beyond just measurements; providing invaluable insights and recommendations for optimising your website based on these critical performance metrics. By prioritising these metrics, you do not just measure but actively enhance the user experience, leading to better visibility and search engine rankings.